various fixes

tools/t.py

@@ -0,0 +1,13 @@
+import tinkoff_grpc
+import market_trade.constants
+
+api_address = market_trade.constants.TINKOFF_API_ADDRESS
+token = market_trade.constants.TINKOFF_BEARER_TOKEN
+authorization_field = market_trade.constants.TINKOFF_AUTHORIZATION_HEADER
+with tinkoff_grpc.Channel(api_address=api_address,
+                          token=token,
+                          authorization_field=authorization_field) as tinkoff_channel:
+    instrument_service = tinkoff_grpc.InstrumentsService(tinkoff_channel)
+    currencies = instrument_service.get_currencies(market_trade.constants.DEFAULT_INSTRUMENT_STATUS)
+    for currency in currencies:
+        print(currency.figi, currency.iso_code)